<?php
/**
 * Admin Page Controller for Zainly Writer
 *
 * @package ZainlyWriter
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

class ZAINLY_Admin_Page {

	/**
	 * Hook admin actions.
	 */
	public static function init() {
		add_action( 'admin_menu', array( __CLASS__, 'register_admin_menu' ) );
		add_action( 'admin_enqueue_scripts', array( __CLASS__, 'enqueue_assets' ) );
		add_action( 'admin_init', array( __CLASS__, 'handle_form_submissions' ) );
		add_action( 'wp_ajax_zainly_test_provider', array( __CLASS__, 'ajax_test_provider' ) );
	}

	/**
	 * Register Admin Menu.
	 */
	public static function register_admin_menu() {
		add_menu_page(
			__( 'Zainly Writer', 'zainly-writer' ),
			__( 'Zainly Writer', 'zainly-writer' ),
			'manage_options',
			'zainly-writer',
			array( __CLASS__, 'render_admin_page' ),
			'dashicons-welcome-write-blog',
			30
		);
	}

	/**
	 * Enqueue styles and scripts only on our admin page.
	 */
	public static function enqueue_assets( $hook ) {
		if ( 'toplevel_page_zainly-writer' !== $hook ) {
			return;
		}

		wp_enqueue_style(
			'zainly-admin-css',
			ZAINLY_URL . 'admin/css/admin-style.css',
			array(),
			ZAINLY_VERSION
		);

		wp_enqueue_style( 'zainly-chat-css', ZAINLY_URL . 'admin/css/chat.css', array(), ZAINLY_VERSION );

		wp_enqueue_script( 'zainly-chat', ZAINLY_URL . 'admin/js/chat.js', array( 'jquery' ), ZAINLY_VERSION, true );
		wp_localize_script(
			'zainly-chat',
			'zainlyChatData',
			array(
				'ajaxUrl' => admin_url( 'admin-ajax.php' ),
				'nonce'   => wp_create_nonce( ZAINLY_Chat::NONCE_ACTION ),
				'i18n'    => ZAINLY_Editor_Panel::chat_i18n(),
			)
		);

		wp_enqueue_style( 'zainly-blog-css', ZAINLY_URL . 'admin/css/blog-writer.css', array( 'zainly-chat-css' ), ZAINLY_VERSION );
		wp_enqueue_script( 'zainly-blog-writer', ZAINLY_URL . 'admin/js/blog-writer.js', array( 'jquery' ), ZAINLY_VERSION, true );
		wp_localize_script( 'zainly-blog-writer', 'zainlyBlog', ZAINLY_Blog::js_config( 0 ) );

		wp_enqueue_script( 'zainly-settings', ZAINLY_URL . 'admin/js/settings.js', array( 'jquery' ), ZAINLY_VERSION, true );
		wp_localize_script(
			'zainly-settings',
			'zainlySettings',
			array(
				'ajaxUrl' => admin_url( 'admin-ajax.php' ),
				'nonce'   => wp_create_nonce( 'zainly_settings_ajax' ),
				'i18n'    => array(
					'test'    => __( 'Test connection', 'zainly-writer' ),
					'testing' => __( 'Testing...', 'zainly-writer' ),
										'network' => __( 'Server communication error.', 'zainly-writer' ),
					'show'    => __( 'Show', 'zainly-writer' ),
					'unsaved' => __( 'You have unsaved changes.', 'zainly-writer' ),
				),
			)
		);

		wp_enqueue_script(
			'zainly-batch-runner',
			ZAINLY_URL . 'admin/js/batch-runner.js',
			array( 'jquery' ),
			ZAINLY_VERSION,
			true
		);

		wp_localize_script(
			'zainly-batch-runner',
			'zainlyData',
			array(
				'ajaxUrl' => admin_url( 'admin-ajax.php' ),
				'nonce'   => wp_create_nonce( 'zainly_batch_nonce' ),
				'i18n'    => array(
					'processing'       => __( 'Processing items...', 'zainly-writer' ),
					'paused'           => __( 'Batch paused. Click Resume to continue.', 'zainly-writer' ),
					'completed'        => __( 'Batch complete! All requested items have been processed.', 'zainly-writer' ),
					'cancelled'        => __( 'Batch cancelled.', 'zainly-writer' ),
					'emptyQueue'       => __( 'No items found matching the selected criteria.', 'zainly-writer' ),
					'confirmStart'     => __( 'Are you sure you want to start generating descriptions?', 'zainly-writer' ),
					'confirmOverwrite' => __( 'You selected to overwrite existing descriptions. This will replace existing excerpts. Proceed?', 'zainly-writer' ),
					'confirmStop'      => __( 'Are you sure you want to stop the batch process?', 'zainly-writer' ),
					'errorFetchStats'  => __( 'Could not load statistics from server.', 'zainly-writer' ),
					'errorFetchQueue'  => __( 'Could not retrieve the queue from server.', 'zainly-writer' ),
				),
			)
		);
	}

	/**
	 * AJAX: test the AI connection.
	 */
	public static function ajax_test_provider() {
		check_ajax_referer( 'zainly_settings_ajax', 'nonce' );

		if ( ! current_user_can( 'manage_options' ) ) {
			wp_send_json_error( array( 'message' => __( 'Unauthorized user.', 'zainly-writer' ) ) );
		}

		$result = ZAINLY_AI_Client::test_connection();

		if ( $result['success'] ) {
			wp_send_json_success( array( 'message' => $result['message'] ) );
		}
		wp_send_json_error( array( 'message' => $result['message'] ) );
	}

	/**
	 * Handle settings and clear-logs form submissions.
	 */
	public static function handle_form_submissions() {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		// Save Settings
		if ( isset( $_POST['zainly_submit_settings'] ) ) {
			check_admin_referer( 'zainly_save_settings', 'zainly_settings_nonce' );

			$submitted = isset( $_POST['zainly_settings'] ) ? (array) wp_unslash( $_POST['zainly_settings'] ) : array(); // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- sanitized field by field in ZAINLY_Settings::sanitize().
			ZAINLY_Settings::update_all( $submitted );

			add_settings_error(
				'zainly_messages',
				'zainly_settings_saved',
				__( 'Settings have been successfully saved.', 'zainly-writer' ),
				'success'
			);
		}

		// Clear Logs
		if ( isset( $_POST['zainly_clear_logs_btn'] ) ) {
			check_admin_referer( 'zainly_clear_logs', 'zainly_clear_logs_nonce' );

			ZAINLY_Logger::clear_logs();

			add_settings_error(
				'zainly_messages',
				'zainly_logs_cleared',
				__( 'Debug logs have been cleared.', 'zainly-writer' ),
				'success'
			);
		}
	}

	/**
	 * Render plugin dashboard with tabs.
	 */
	public static function render_admin_page() {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		$current_tab = isset( $_GET['tab'] ) ? sanitize_key( wp_unslash( $_GET['tab'] ) ) : 'settings'; // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- read-only tab switch.
		$valid_tabs  = array( 'settings', 'chat', 'blog', 'batch', 'logs' );
		if ( ! in_array( $current_tab, $valid_tabs, true ) ) {
			$current_tab = 'settings';
		}
		?>
		<div class="wrap zainly-admin-wrap">
			<div class="zainly-hero">
				<div class="zainly-hero-icon"><span class="dashicons dashicons-welcome-write-blog"></span></div>
				<div class="zainly-hero-text">
					<h1 class="zainly-main-title">
						<?php esc_html_e( 'Zainly Writer', 'zainly-writer' ); ?>
						<span class="zainly-version-tag">v<?php echo esc_html( ZAINLY_VERSION ); ?></span>
					</h1>
					<p><?php esc_html_e( 'Write descriptions for posts and products, chat with AI, and bulk-generate in one place.', 'zainly-writer' ); ?></p>
				</div>
				<div class="zainly-hero-status">
					<?php
					if ( ! ZAINLY_AI_Client::is_available() ) :
						?>
						<span class="zainly-chip-status is-bad"><span class="dashicons dashicons-warning"></span> <?php esc_html_e( 'No AI provider connected', 'zainly-writer' ); ?></span>
					<?php else : ?>
						<span class="zainly-chip-status is-good"><span class="dashicons dashicons-yes-alt"></span> <?php esc_html_e( 'AI connected', 'zainly-writer' ); ?></span>
					<?php endif; ?>
					<span class="zainly-chip-status"><span class="dashicons dashicons-admin-post"></span> <?php echo esc_html( implode( ', ', ZAINLY_Settings::get_target_post_types() ) ); ?></span>
				</div>
			</div>

			<?php settings_errors( 'zainly_messages' ); ?>

			<nav class="nav-tab-wrapper zainly-nav-tabs">
				<a href="<?php echo esc_url( add_query_arg( array( 'page' => 'zainly-writer', 'tab' => 'settings' ), admin_url( 'admin.php' ) ) ); ?>" class="nav-tab <?php echo ( 'settings' === $current_tab ) ? 'nav-tab-active' : ''; ?>">
					<span class="dashicons dashicons-admin-generic"></span>
					<?php esc_html_e( 'Settings & AI Setup', 'zainly-writer' ); ?>
				</a>
				<a href="<?php echo esc_url( add_query_arg( array( 'page' => 'zainly-writer', 'tab' => 'chat' ), admin_url( 'admin.php' ) ) ); ?>" class="nav-tab <?php echo ( 'chat' === $current_tab ) ? 'nav-tab-active' : ''; ?>">
					<span class="dashicons dashicons-format-chat"></span>
					<?php esc_html_e( 'AI Chat', 'zainly-writer' ); ?>
				</a>
				<a href="<?php echo esc_url( add_query_arg( array( 'page' => 'zainly-writer', 'tab' => 'blog' ), admin_url( 'admin.php' ) ) ); ?>" class="nav-tab <?php echo ( 'blog' === $current_tab ) ? 'nav-tab-active' : ''; ?>">
					<span class="dashicons dashicons-edit-page"></span>
					<?php esc_html_e( 'Blog Writer', 'zainly-writer' ); ?>
				</a>
				<a href="<?php echo esc_url( add_query_arg( array( 'page' => 'zainly-writer', 'tab' => 'batch' ), admin_url( 'admin.php' ) ) ); ?>" class="nav-tab <?php echo ( 'batch' === $current_tab ) ? 'nav-tab-active' : ''; ?>">
					<span class="dashicons dashicons-update"></span>
					<?php esc_html_e( 'Batch Generator', 'zainly-writer' ); ?>
				</a>
				<a href="<?php echo esc_url( add_query_arg( array( 'page' => 'zainly-writer', 'tab' => 'logs' ), admin_url( 'admin.php' ) ) ); ?>" class="nav-tab <?php echo ( 'logs' === $current_tab ) ? 'nav-tab-active' : ''; ?>">
					<span class="dashicons dashicons-analytics"></span>
					<?php esc_html_e( 'Activity & Debug Logs', 'zainly-writer' ); ?>
					<span class="zainly-counter-pill"><?php echo esc_html( ZAINLY_Logger::get_count() ); ?></span>
				</a>
			</nav>

			<div class="zainly-tab-content">
				<?php
				switch ( $current_tab ) {
					case 'chat':
						require_once ZAINLY_PATH . 'admin/views/chat-tab.php';
						break;
					case 'blog':
						require_once ZAINLY_PATH . 'admin/views/blog-tab.php';
						break;
					case 'batch':
						require_once ZAINLY_PATH . 'admin/views/batch-tab.php';
						break;
					case 'logs':
						require_once ZAINLY_PATH . 'admin/views/logs-tab.php';
						break;
					case 'settings':
					default:
						require_once ZAINLY_PATH . 'admin/views/settings-tab.php';
						break;
				}
				?>
			</div>

			<p class="zainly-credit">
				<?php
				printf(
					/* translators: 1: author name, 2: website link */
					esc_html__( 'Developed by %1$s - %2$s', 'zainly-writer' ),
					'<strong>' . esc_html( ZAINLY_AUTHOR ) . '</strong>',
					'<a href="' . esc_url( ZAINLY_AUTHOR_URL ) . '" target="_blank" rel="noopener">zaincorporations.com</a> | <a href="' . esc_url( ZAINLY_LINKEDIN_URL ) . '" target="_blank" rel="noopener">LinkedIn</a>'
				);
				?>
			</p>
		</div>
		<?php
	}
}